<!DOCTYPE html>
<style>body, html { margin: 0; }</style>
<svg>
  <filter id="f">
    <feFlood flood-color="green">
      <set attributeName="x" to="10"/>
      <set attributeName="y" to="10"/>
      <set attributeName="width" to="100"/>
      <set attributeName="height" to="100"/>
    </feFlood>
  </filter>
  <rect x="10" y="10" width="100" height="100" filter="url(#f)"/>
</svg>
